Spirobifluorene compound and perovskite solar cell comprising same

Patent metadata

Field	Value
Publication number	US-11563180-B2
Application number	US-201716348861-A
Country	US
Kind code	B2
Filing date	Nov 8, 2017
Priority date	Nov 9, 2016
Publication date	Jan 24, 2023
Grant date	Jan 24, 2023

Abstract

A spirobifluorene compound and a perovskite solar cell including the spirobifluorene compound are disclosed. More particularly, a spirobifluorene compound which can be used as a hole transport material of a perovskite solar cell is disclosed. A perovskite solar cell including the spirobifluorene compound as a hole transport material is further disclosed.

First claim

The invention claimed is:

1. A perovskite solar cell comprising a first electrode, an electron transport layer formed over the first electrode, a light absorption layer formed over the electron transport layer, a hole transport layer formed over the light absorption layer, and a second electrode formed over the hole transport layer, wherein the light absorption layer comprises a perovskite compound containing a monovalent organic cation consisting of R 21 -NH 3 + and

a divalent metal cation, and a halogen anion consisting of BR − and I − : wherein R 21 is a C1-C24 alkyl group, a C3-C20 cycloalkyl group, or C6-C20 aryl group, and R 22 to R 26 are independently of one another hydrogen, a C1-C24 alkyl group, a C3-C20 cycloalkyl group, or a C6-C20 aryl group, and wherein the hole transport layer comprises a spirobifluorene compound selected from the following compounds:

2. A method of making the perovskite solar cell of claim 1 , the method comprising:
providing an intermediate structure comprising a first electrode and a light absorption layer over the first electrode, wherein the light absorption layer comprises a perovskite compound containing a monovalent organic cation consisting of R 21 -NH 3 + and

a divalent metal cation, and a halogen anion consisting of Br − and I − : wherein R 21 is a C1-C24 alkyl group, a C3-C20 cycloalkyl group, or C6-C20 aryl group, and R 22 to R 26 are independently of one another hydrogen, a C1-C24 alkyl group, a C3-C20 cycloalkyl group, or a C6-C20 aryl group;
forming, over the light absorption layer, a hole transport layer comprising a spirobifluorene compound selected from the following compounds:

and
forming a second electrode over the hole transport layer.

3. The method of claim 2 , wherein forming the hole transport layer comprises:
providing a solution comprising the spirobifluorene compound and a solvent;
applying the solution on the surface to form a liquid layer; and
drying the solvent off the liquid layer to form the hole transport layer over the light absorption layer.

Assignees

• Korea Res Inst Chemical Tech
• Korea Research Institute Of Checmical Tech

Inventors

• Lee Jaemin
• Na Hye Jin
• Jeon Nam Joong
• Seo Jang Won
• Noh Jun Hong
• Yang Tae Youl
• Seok Sang Il

Classifications

• H01L51/0077

  Electricity · mapped topic

• C07C2603/97

  containing five-membered rings · CPC title

• C07C217/92 Primary

  the nitrogen atom of at least one of the amino groups being further bound to a carbon atom of a six-membered aromatic ring · CPC title

• Y02E10/549

  Organic PV cells · CPC title

• H01L51/006 Primary

  Electricity · mapped topic